<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>双飞翼</title>
</head>
<style>
    * {
        padding: 0;
        margin: 0;
    }

    .container {
        box-sizing: border-box;
        width: 100%;
        min-width: 650px;
        height: 100vh;

        
      
    }

    .fl {
        float: left;
    }

    .left {
        width: 200px;
        height: 300px;
        background: red;
        margin: 0 -100%;
    }

    .center {
        width: 100%;
    }

    .inn {

        /* min-width: 250px; */
        height: 300px;
        background: yellow;
        margin: 0 200px;
    }

    .right {
        width: 200px;
        height: 300px;
        background: blue;
        margin-left: -200px;

    }
</style>

<body>
    <div class="container">
        <div class="center fl">
            <div class="inn">zhong</div>
        </div>
        <div class="left fl">左</div>
        <div class="right fl">右</div>
    </div>
</body>

</html>